EarthX ETX36C Blue Light Weight LiFePO4 Complete Battery (with Battery Management System for Performance And Longevity) Extremely Light Weight, 70-80% lighter than a lead acid Very low self-discharge rate, can sit on a shelf for a year Environmentally friendly, no acid or lead. Will not sulfate, corrode, freeze or boil over Maintenance free. Fast Charging. Solid brass terminal adapters for extremely easy installation Higher starting voltage means faster, more powerful, starts ETX36C replaces YTX14H-BS, YTX20CH, GYZ16H, as an upgrade and also used for snowmobiles